Question 2 :
When a substance changes from one state to another, it absorbs or loses a large amount of heat without any change in temperature. What does this type of energy known as?<br>

Question 3 :
Find the heat needed to convert 10 g of water into vapour (Latent heat of vapourisation of water $=2.24 \times 10^6 J kg^{-1})$

Question 5 :
The process of a liquid changing into a solid is called:

Question 7 :
<span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">Two identical tumblers are filled fully with water <span>at a certain temperature. One of the tumblers is </span><span>warmed up and the other cooled down. But it is </span><span>observed that the water overflows from both the </span><span>tumblers. The temperature at which they are fully </span><span>filled is</span></p>

Question 9 :
A beaker is completely filled with water at $4^{\circ}C$. It will overflow if<br>

Question 10 :
Fill in the blank spaces:<div>The amount of heat energy supplied to boiling water at $100^{0}C$ is called latent heat of -------------- of steam.</div>

Question 11 :
The quantity of heat absorbed by a substance during the change of its state without rising its temperature is called latent heat.

Question 16 :
When surface water in a lake is just going to freeze, then what is the temperature of water at the bottom?

Question 17 :
Which of the following at $100^o$C produces most severe burns ?<br/>

Question 18 :
_______ is the heat supplied during change of state of matter.

Question 19 :
The amount of heat required to change from liquid state to gaseous state without rise in its temperature is called latent heat of vaporisation.

Question 20 :
<p class="wysiwyg-text-align-left"><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">Water at $4^{0}$C</span></span><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"> is filled to the brim of 2 beakers. A </span></span><span>boy performed an experiment A of heating and </span><span>B of cooling. The observation was :</span></p>